Good Morning @PolishPenguin my friend, I had a similar issue with my mic since the installation of Manjaro on my lenovo computer. I have an x11 #carbon Gen 8 or 9 I believe. I don’t know what is the computer you have on. I am assuming that you have a modern computer.
You said you had the latest version of the kernel running, did you check if version 5.14 is available to you? My problem was that I had two sound servers running, is that what you got? I noticed that you do have More than one sound server running on your system.
Maybe @nikgnomic can help. Should this user turn off the sound servers other than alsa? to get things going? My apologies if tagging you on this post is not appropriate, but since this problem is similar to mine I thought help would be OK.
In conclusion, If I am correct upgrade the kernel to v5.14. Stop the sound servers that you should not have. Last,
this was an advice given to me.
I hope this helps for you. Thank you for posting.